Improvement in shuttles



H. E. TOWLE.

Shuttle.

110.108,40). Patented Oct. 18, 1870.

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HAMILTON E. TOWLE,

OF NEW YORK, N. Y.

Letters Patent No. 108,409, dated October 18, 1870; antedated October 12, 1870.

IMPROVEMENT lN SHUTTLES.

The Schedule referred to in these Letters Patent and making part of the sama To all-whom it 'muy concern` Bc it known that I, HAMILTON E. owing of New York, in the county and State of New York, have invented a certain new and useful Improvementin ,Shuttles of which the following is a specification.

The said invention relates to the adjustment of the tension of the weft drawn from the shuttle, and is applicable to the regulation of the tension in sewing-machines, and to other similar purposes in which it may be desirable to regulate thc degree ot' tension ot' a spring, and the method in which the tension is applied and varied within the range of' its elasticity.

The variations of the tension on the wei't require 1hnt thc iilling,sh:tll be strong enough to withstand the greatest ordinary strain to which it may be subjected, and the application of means by which the tension may be made more uniform permits the employment, therefore, of the finest thread and tho highest rato ot speed in the loom.

When the delivery from the bobbin, whether full or nearly empty, continues the santo, with a uniform tension, the fabric will have a corresponding unit'ortnil y iu texture, and present a stra-ight and regular sciv- Ihe inventirni consists in theapplieation of a spring und a lever that bears upon the tilling in the spool, or hobhin, or quill ofthe shuttle,the total amount of the l'orec exerted by the spring being adjusted by means nl' a key, und the manner of the application of thc i'oree so adjusted being regulated by the position ot' the 4lith-ruin oi' thc lever, so that, when the spool is nearly empty, and the spring is at its least extension, the leverage is most direct upon it, or at right angles; und, when the spool is quito full, and the strain upon the spring the greatest, its face is applied more angnlnrly to the lever.

Inscription of the Drawing.

Figures 1 and 2 represent, respectively, a plait and elevation ol' a shuttle, with the spool or quill placed with its axis nt right angles to the lino of motion of the shuttle.

. '.lhisl position ol' tho spool is preterrml, because the angle ol' the delivery ot' the thread rcnraius more nearly constant than is thc ease when the axis ot' the spool conforms with tholongitrulinal axis ot' the shutlle.

'lhe shuttle l ineases the spool b, which turns upon thc axis e, and is pressed upon by the lever d bearing upon the iilling.

The opposite end of the lever, beyond the iulerum e, is attached to the springf, that is stretched by the cord i passing over the pulley g, and winding around the barrel h, which may be turned by the key k.

By tightening up the cord with the key, the elongation and elastic force of the spring, and its action upon the level', may be regulated at pleasure.

The friction of the pin or barrel in the material of the shuttle is sutrieient to retain it for practical purposes.

,In the position oi' the lever shown in the drawing, the end at the spool is upon the least amount of filling, and the tension of the spring is at its minimum but the end of the lever to which the force ot' the spring is applied is at right angles to the direction ot' the force, and, therefore, receives the lessened force most advantageously.

In a similar manner, when the spool is full, and the spring most extended, and exercising its greatest force, tho force of the springA is applied at au angle less than ninety degrees, and, therefore, at a. disadvantage.

At the two extreme points, and between them, the varying tension of the spring is accompanied bya corresponding variation of the angle at which the teusion or force is applied, so that the retaining power upon the spool, resulting from the application oi' the variable spring through the variable lever, remains unchanged.

The hub of the lever' should be made of sufficiently large diameter to be bored with several holes for the reception of the piu upon which it turns, to enable the position of the fulcrum, and the consequent augularity of the leverage, to be changed or adjusted as may be required.

The same end may be attained by any other means of shifting the center, and the position of the center may, likewise, be adapted to the end of the lever bearing upon the spool, for the purpose of accomplishing the same result, by making its action more or less angular upon the spool, as the spool is more or less full.

I claim as my invention- The combination, with the shuttle, of the spring, the lover, and the barrel for regulating the strength or tension ot' the spring, when constructed and combined substantially as described, so that the force of the spring and lever may he varied, to produce a unii'orm tension ofthe shuttle-thread, notwithstanding the decreasing sizeof the bobbin.

vNew York, J une 24, 1869.

HAMILTON E. TOWLE.

Witnesses:

T. W. FAnNswoRTH, Femm. L. Manus. 

